You Reply: Thank you for the new library. It works fine for me.
Nevertheless, I haven't been capable of turning off the back light. I've tried passing HIGH and LOW to the function but the result is the same. I don't have the proper equipment to test it, but using an LED, it only glows very dimly.
Could this be because the UNO board, pin 7 (back light one) is a regular output, while in Mega2560 is a PWD one?